Hi "Christian,

I love your patch! Yet something to improve:

[auto build test ERROR on drm-tip/drm-tip]
[also build test ERROR on next-20211028]
[cannot apply to drm/drm-next drm-intel/for-linux-next drm-exynos/exynos-drm-next tegra-drm/drm/tegra/for-next linus/master airlied/drm-next v5.15-rc7]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch]

url:    https://github.com/0day-ci/linux/commits/Christian-K-nig/dma-buf-add-dma_fence_describe-and-dma_resv_describe/20211028-171805
base:   git://anongit.freedesktop.org/drm/drm-tip drm-tip
config: m68k-allyesconfig (attached as .config)
compiler: m68k-linux-gcc (GCC) 11.2.0
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # https://github.com/0day-ci/linux/commit/80ae7cf414dbdb7fa9f48a46cc1bfa25b0a4fda7
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Christian-K-nig/dma-buf-add-dma_fence_describe-and-dma_resv_describe/20211028-171805
        git checkout 80ae7cf414dbdb7fa9f48a46cc1bfa25b0a4fda7
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross ARCH=m68k 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>

All errors (new ones prefixed by >>):

   drivers/dma-buf/dma-fence.c: In function 'dma_fence_describe':
>> drivers/dma-buf/dma-fence.c:919:9: error: implicit declaration of function 'seq_printf'; did you mean 'bstr_printf'? [-Werror=implicit-function-declaration]
     919 |         seq_printf(seq, "%s %s seq %llu %ssignalled\n",
         |         ^~~~~~~~~~
         |         bstr_printf
   cc1: all warnings being treated as errors


vim +919 drivers/dma-buf/dma-fence.c

   909	
   910	/**
   911	 * dma_fence_describe - Dump fence describtion into seq_file
   912	 * @fence: the 6fence to describe
   913	 * @seq: the seq_file to put the textual description into
   914	 *
   915	 * Dump a textual description of the fence and it's state into the seq_file.
   916	 */
   917	void dma_fence_describe(struct dma_fence *fence, struct seq_file *seq)
   918	{
 > 919		seq_printf(seq, "%s %s seq %llu %ssignalled\n",
   920			   fence->ops->get_driver_name(fence),
   921			   fence->ops->get_timeline_name(fence), fence->seqno,
   922			   dma_fence_is_signaled(fence) ? "" : "un");
   923	}
   924	EXPORT_SYMBOL(dma_fence_describe);
   925	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org